ATA 21 groups the systems that condition cabin and equipment air and, on pressurized aircraft, control cabin pressure. The exact architecture may use engine bleed air, electric compressors, air-cycle machines, vapor-cycle cooling or combinations of these.
Cabin temperature, ventilation, cooling and pressurization-related systems.
ATA 21 groups the systems that condition cabin and equipment air and, on pressurized aircraft, control cabin pressure. The exact architecture may use engine bleed air, electric compressors, air-cycle machines, vapor-cycle cooling or combinations of these.
Cabin temperature, ventilation, cooling and pressurization-related systems.
Crew interfaces may show zone temperatures, pack status, cabin altitude, differential pressure, vertical speed, valve position and caution or fault messages.
Air leaks, contamination, airflow restrictions, sensor disagreement, valve or actuator faults, pack performance, pressurization leakage and configuration-specific test conditions are common areas of evaluation.
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A system assembly that regulates, cools and conditions pneumatic air for cabin or equipment use.
BEGINNERCabin altitudeThe atmospheric altitude corresponding to the pressure maintained inside the aircraft cabin.
INTERMEDIATEAir cycle machineAir Cycle Machine: rotating equipment that cools and conditions compressed air in an aircraft environmental-control system.
INTERMEDIATEOutflow valveA controlled valve that regulates cabin pressure by managing the amount of air leaving the pressure vessel.
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